X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fcmm%2FCmmMachOp.hs;h=6e890355a52551713e035a7f955b3da23c04f569;hp=5e1ac16f785e85a5f432df013259289dd7ccc111;hb=93d6c9d532b678a91bafd4bf5f5f10c4f4b6d9b9;hpb=5fb59c02d3829cdd88cb2180237aba4ea4a2f66a

diff --git a/compiler/cmm/CmmMachOp.hs b/compiler/cmm/CmmMachOp.hs
index 5e1ac16..6e89035 100644
--- a/compiler/cmm/CmmMachOp.hs
+++ b/compiler/cmm/CmmMachOp.hs
@@ -459,7 +459,15 @@ data CallishMachOp
   | MO_F32_Sqrt
   | MO_WriteBarrier
   | MO_Touch         -- Keep variables live (when using interior pointers)
+  
+  -- Note that these three MachOps all take 1 extra parameter than the
+  -- standard C lib versions. The extra (last) parameter contains
+  -- alignment of the pointers. Used for optimisation in backends.
+  | MO_Memcpy
+  | MO_Memset
+  | MO_Memmove
   deriving (Eq, Show)
 
 pprCallishMachOp :: CallishMachOp -> SDoc
 pprCallishMachOp mo = text (show mo)
+